If A goes down or if I lose interest in it, I’ll need to re-establish somewhere else and resubscribe everything
Correct, as of now, but the point is that you can resub elsewhere. This is entirely impossible on centralised private platforms like Reddit.
Everyone going mad and many suggesting “if you have it use Safari instead!” when Apple implemented essentially this same thing quite some time ago in Safari 🤔
That said intentions are important. I have little faith that Big G’s goal is anything other than self servin.